Abaixo está uma instrução que descreve uma tarefa de geração de SQL, combinada com uma entrada que fornece mais contexto sobre os esquemas de tabela disponíveis. Escreva o código SQL que responda adequadamente à solicitação
 ###Instrução: Qual data De Vries começou?
 ###Tabelas: CREATE TABLE sheffield_united (sheffield_united_id AUTO_INCREMENT PRIMARY KEY, Season VARCHAR, Division VARCHAR, League Apps INT, League Goals INT, FA Cup Apps INT, FA Cup Goals INT, Total Apps INT, Total Goals INT) CREATE TABLE calculations (calculations_id AUTO_INCREMENT PRIMARY KEY, Level INT, Shuttles INT, Cumulative Shuttles INT, Speed (km/h) VARCHAR, Shuttle Time (seconds) VARCHAR, Total level time (s) VARCHAR, Distance (m) INT, Cumulative Distance (m) INT, Cumulative Time (min and seconds) VARCHAR) CREATE TABLE connecting_lines (connecting_lines_id AUTO_INCREMENT PRIMARY KEY, Line Name VARCHAR, Date Closed VARCHAR, NIMT Junction VARCHAR, Terminus VARCHAR, Length VARCHAR) CREATE TABLE 2005_ladder (2005_ladder_id AUTO_INCREMENT PRIMARY KEY, Golden Rivers VARCHAR, Wins INT, Byes INT, Losses INT, Draws INT, Against INT) CREATE TABLE loans (loans_id AUTO_INCREMENT PRIMARY KEY, No. INT, P VARCHAR, Name VARCHAR, Country VARCHAR, Age INT, Loan Club VARCHAR, Started VARCHAR, Ended VARCHAR, Start Source VARCHAR, End Source VARCHAR)  
SELECT Started FROM loans WHERE Name = de Vries